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PERIODIC TABLE Ch 1.2-1.3 MAP OF THE ELEMENTS PERIODS OF ELEMENTS  Elements are placed in periods going horizontally (across) the periodic table  Each.

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Presentation on theme: "PERIODIC TABLE Ch 1.2-1.3 MAP OF THE ELEMENTS PERIODS OF ELEMENTS  Elements are placed in periods going horizontally (across) the periodic table  Each."— Presentation transcript:

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2 PERIODIC TABLE Ch 1.2-1.3 MAP OF THE ELEMENTS

3 PERIODS OF ELEMENTS  Elements are placed in periods going horizontally (across) the periodic table  Each row begins as the pattern of physical and chemical properties repeats itself  There are 7 rows, or periods, on the Periodic Table

4 PERIOD FACTS 1. The size of atoms decrease 2. Atomic # and Atomic Mass increase 3. The elements change from metals through metal-like (metalloids) elements to nonmetals 4. The row number indicates the number of electron energy levels

5 FAMILIES OF ELEMENTS  Elements with similar arrangements of electrons have similar properties.  Elements with similar electron arrangements are grouped together in families, or groups.  There are 18 groups or families.

6 Circle your level of understanding of these concepts: 1234

7 Family number tells how many electrons are in outer energy level. The number of electrons in the outer energy level of an atom determines if and how the element will combine with other elements.

8 COMBINING ATOMS  Elements usually combine in a way that will give them 8 electrons in their outer (last) energy level.  The exceptions to this rule are elements like hydrogen and helium with only a first energy level, with 2 electrons.

9 COMBINING ATOMS Sodium will give away one electron (+1) and chlorine will take (-1) that one electron. Each element will then have a full (8 e - ) outer energy level.

10 Circle your level of understanding of these concepts: 1234

11 STAIR-STEP LINE  Found on the right side of the table.  The elements to the left are metals (except hydrogen)  The elements to the right are non-metals  On either side of the stairs are the metalloids

12 PROPERTIES OF NON-METALS Many are gases at room temp The solids are easily crushed and do not shine Do not conduct heat and electricity Sulfu r

13 PROPERTIES OF METALS  Solid at room temperature  Shiny, malleable (bendable), & ductile (flexible)  Good conductors of heat and electricity

14 PROPS OF METALLOIDS  Have properties of both metals and non-metals  Dull in color  Not malleable (bendy)  Conduct a current & heat  Solids at room temp

15 REACTIVITY OF ELEMENTS  The most reactive metals are in the lower left corner of the Periodic Table  Not counting Family 18, the most reactive gases are in the upper right corner

16 Circle your level of understanding of these concepts: 1234


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